I have the tach off of my 1980 GS550l Suzuki at the moment since I need to replace the bulb....

A while back.... one of the two little screws on the face of the gauge behind the needle vibrated out and I was going to put it back in.. but..

The glass cover doesnt come off... so I cant access the screw.... I have a CLYMER Maintenance book for the bike that tells you everything there is to know about this thing.... and when I got to the teardown diagram for the tach... it shows it tore down as far as I have it now.... it doesnt show that the face comes off....

Im wondering if its just formed on there from the factory after the face and needle are screwed on and im pretty much stuck with that screw bouncing around in there until the end of time....

I dont suppose anyone knows a way to get it off or if Im correct in my assumption or not? Thanks for any help...